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A. CARD.

PUMP.

APPLICATION FILED IuLY 29, IQIII.

1,326,024. I v Patented Dec. 23,1919.

2 SHEETS-SHEET I.

A. CARD'.

Pum?.

APPLICATION FILED JULY 29, 1918.

' 1,326024 v Patented Dea. 23,1919.

2 SHEETS-SHEET 2.

www WWI A A TORNE V8 ARTHUR CARD, or Los ANGELES, cALIFoRnIA.

PUMP.

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Specification of Letters Patent.

Patented Dec. 23, 1919.

Application led July 29, 1918. Serial N0. 247,270.

To all whom it may concern Be it known that I, ARTHUR CARD, a citizen ofthe United States, and a resident of Los Angeles, in the county of LosAngeles and State of California, have invented. a new and 4ImprovedPump, of which the following is a full, clear, and exact description.

My invention relates particularly to that type of pumps employing awalking beam and a vertical reciprocating pump rod actuated thereby. c

General objects of my invention are to provide a pump of the indicatedcharacter in which the Walking beam is so mounted and actuated astovibrate on a center shifting to and from thev vertical line of thepump rod in addition to the vibrating movement of the beam `^in avertical plane; and

to provide `guide means for said beam in its vertical vibratorymovements and for the pin constituting the shifting center of the beam,whereby the pump rod will be given a direct rectilineal reciprocatingmovement without friction and without the provision of guide means forsaid rod. V

'Reference is to be had tothe accompanying drawings forming a part ofthis specification, it being understood that the drawings are merelyillustrative of one example of the invention.

Figure l is a side elevationV of a pump y embodying myinvention;

Fig. 2 is a plan View thereof; y l Fig. 3 is a detail cross section onthe line ses, Fig. 2; v t s Figs. 4 andl 5. are cross tively on theline4-4 and 5-5', Fig. 1;

dit

Fig. 6 is alongitudinal fvertical section on the line 6 6, Fig. 2,showing the walking beam slots 17 and sections respecapproximatelyV atthe end ofthe upstroke of the pump rod;

of the downward stroke andthe pump rod l2 actuated in.

in the frame 10 about a center shiftable longitudinally of the frametoward and from the vertical path of movement of the pump rod. In theillustrated example-the fulcrumed end of the beam 14 is formed with ahub or enlargement 15 snugly accommodated between standardslOa in theframe. A pin 16 constituting the fulcrum of the beam and its 'shiftingcenter of movement extends transversely to the beam at the hub 15l andprojects at its ends into longitudinal slots 17 so that the pin may movelongitudinally of the frame as the beam vibrates. In addition to theslots 17 the standards 10a have longitudinal grooves 19 extending aroundthe sides and about theends of the adapted to receive suitable guideelements here shown as rollers 18.

In addition to the guide means for thev l shifting center pin 16 of thebeam 14,1 provide means to guide the beam in its vertical vibratorymovements and acting to shift the beam and its fulcrum pin 16independently of the pump rod, for which purpose use is made ofapproximately upright guides designated .generally by .the numeral 20formed on the fralne 10' forward of the longitudinal slots 17 andgrooves 19, and said guides 20 are formed with arcuate slots 2l andarcuate grooves 22 extending at the sides and ends of the slots.` Atransverse guide pin 23 extends through the beam let and projects at itsends into the slots 21' to have guided movement therein. Also on saidpin 23 guide elements are provided preferably in the form of rollers24traveling in grooves 22, as best seeninFig. at. rIhe pin 23 passesthrough a hub is accommodated between the spaced guides 20. Thestandards 10a and guides 2O are integral With eachother vthrough themedium of webs 25 forming part of the frame 10 and said webs and thestandards 10a are braced by transverse bolts or rivets 25a, in theillustratedy example.

he drive means for the pumpincludes any vsuitable drive shaft 27 hereshownas having a pulley28 adapted to receive a belt from any convenientsource of power (not or enlargement V:'Zlformed on the beam 14 and iceshown). The drive shaft in the illustrated The two pinions and gearwheels at opposite sides are to balance the drive. A crank pin 34 iscommon tothe two gear wheels 31 and passes transversely through alongitudinal slot 35 in the beam 14, said slot extending at oppositesides of the pump rod 12, so that the crank pin 34 may have movementacross a line lconstituting an extension of the longitudinal axis of thepump rod. @n the crank pin 34'additional guide means is provided toengage the beam, and preferably consisting of a roller 36 operating in agroove 37 in the beam and, following the lines of the slot 35. The upperside of the beam 14 at the slot 85 is formed by a detachable member 14asuitably secured by bolts 14b or the like to permit the ready insertionand removal of the crank pin 34.

With the described arrangement it will be seen that the turning of thedriven wheels l carries the crank pin 34, and the movement of the crankpin 34 about the axis lof said wheels causes said pin totraverse saidslot 35'so that vthe crank pin passes alternately forward and back ofthepump rod and thereby gives vibratory movement to the beam 14, whereby toreciprocate the pump rod. As the beam is thus vibrated the fpin 23 androllers 24 engage the slots 21 and grooves 22 of the guides 20 and thecurved path thus determined for the said pin and rollers causes the beamand thefulcrum pin 16 to be shifted relatively Itoland from therectilineal path of the pump rod so that the pivotallconneetion betweenthe pump rod and'beam is caused to travel in a direct line,

thereby relieving the pump rod of lateral strain and'permitting it tohave direct rectilineal movement. At the same time the shifting fulcrumpin 16 is afforded guided ots 17.

In practice, the size of the walking beam, its point'of connection withthe pump rod, the size and curvature of slot 21, as well as otherdetails -will be determined according to the conditions under which thepump is designed to operate with .respect to the depthv of the well andlike factors.

I would state in conclusion that while the illustrated example,constitutes a practical embodiment offmy invention, I do not limitmyself strictly to the mechanical details herein illustrated, sincemanifestly the same can be considerably f varied without departure fromthe spirlt of the invention as defined in the appended claims.

" guide. *L

neaaeae `Having thus described my invention, Ti claim as new, anddesireto secure by Letters Patent:

1. A pump of the class described ineluding a pump rod adapted to haverectilineal reciprocating movement, a which said rod is pivotallytherein at both sides of the pivot ofthe pump rod, a driven revolubleelement, a crank pin on said element engaging said beam in said slot totravel along the latter walking beam to connected, said beam having alongitudinal slot extendingback and forth at each revolution of saidelement, shiftable fulcrum means for said beam, a fixed curved guide,and means on the walking beam and engaging said guide to shift the beamand its fulcrum during the revolution of saidl driven element tomaintain the pivotal connection between Vthe walking beam and the pumprod in line .with the rec'tilineal path of the pump'rod.

2. A pump of the class described comprising a pump rod adaptedl to havereetilineal reciprocating movement, a walking beam toN means carried bysaid walking beam to slide v l pin said slots, one ofsaid meansconstituting a movable fulcrum'for said walking beam,

whereby the pivotal connection between the walking beamand 3. A pump ofthe class described comprising a pump rod adaptedto have rectilinealreciprocating movement, a walking beam to which said rod said beamhaving a longitudinalislot exg the pump rod is main-4 tained 1n linewith the longitudinal axis ofy is pivotally connected,v

tending therein, a driven revoluble element,l`

a crank pin on said elementengaging said beam in said slot to travelalong the latter back and forth at each revolution of said element, abase for supporting the revoluble element, a fulcrum slidable toward andawayfrom the longitudinal `axis of the pump rod,

and meansfcarried by a fixed curved guide,

the 'curved the walking beam for engaging

